On transformations from semi-three-way decision spaces to three-way decision spaces based on triangular norms and triangular conorms

In view of the shortcomings of the existing radar emitter threat evaluation, the model is applied to emitter threat evaluation by utilizing the uncertainty problem processing ability and delayed decision making ability of intuitionistic fuzzy set(IFS)-three-way decision(TWD) model. Firstly, five PDW parameters of radar emitter are extracted, fuzzy matrix of target set and attribute set and weight matrix of PDW parameters are constructed, and then fuzzy transformation is used to construct synthetic intuitionistic fuzzy set matrix. Then, an intuitionistic fuzzy set-three-way decision model is constructed by combining threshold value and intuitionistic fuzzy set matrix. Finally, the threat degree of emitter is evaluated according to the model. The experimental results show that the model overcomes the uncertainty in the process of processing and avoids the judgment error easily caused by two-way decision. The emitter is divided into different domains according to the degree of emitter threat, and the emitter threat evaluation is realized with high speed and reliability.

Emitter Threat Evaluation Based on IFS-TWD

Overlap and grouping functions, as two kinds of particular binary aggregation functions, have been continuously discussed in the literature for their vast preponderance in some real applications. Meanwhile, after Hu introduced the notion of three-way decision spaces, the decision evaluation functions in three-way decision spaces constructed from the so-called semi-decision evaluation functions have been investigated consistently. This paper continues to consider this research topic and mainly focuses the decision evaluation functions in three-way decision spaces obtained from overlap and grouping functions. Firstly, based on overlap and grouping functions, we give several methods of constructing semi-decision evaluation functions in semi-three-way decision spaces. Secondly, we show some novel semi-decision evaluation functions which are related to fuzzy sets, interval-valued fuzzy sets, fuzzy relations and hesitant fuzzy sets, respectively. Finally, using overlap and grouping functions, we get some ways to construct decision evaluation functions in three-way decision spaces from semi-decision evaluation functions in semi-three-way decision spaces.

On decision evaluation functions in three-way decision spaces derived from overlap and grouping functions

Using one axiom to characterize L-fuzzy rough approximation operators based on residuated lattices

Three-way decisions based on semi-three-way decision spaces

The covering rough set model is viewed as a generalization of the rough set model. The covering rough set is built on a universe of discourse. A similar idea can be applied into three-way decisions theory to obtain covering-based three-way decisions which is the main object of this study. This paper firstly provides a summary of study on the three-way decisions based on covering rough set by applying the approach of decision-theoretic rough set. Then, the Bayesian decision procedure theory is implemented to covering decision systems.

Three-way decisions based on covering rough set

This paper studies L-fuzzy multigranulation rough set based on residuted lattices, which is considered as an extension of the classical L-fuzzy rough set. Two models of L-fuzzy optimistic multigrannulation rough set and L-fuzzy pessimistic multigrannulation rough set based on residuted latteices are suggested. Then, we mainly investigate some funda- mental properties of the L-fuzzy multigranulation rough set model. With regards to residuated lattices' topology, we study the topological and the lattice structure in the L-fuzzy optimistic multigranulation rough set model and L-fuzzy pessimistic multigranulation rough set model, respectively.

L-fuzzy multigranulation rough set based on residuated lattices

Trong bài báo này, một cấu hình và phương pháp PWM mới cho nghịch lưu ba bậc tăng áp tựa khóa chuyển mạch hình T để giảm điện áp đặt trên tụ được trình bày. Trạng thái ngắn mạch (ST) được chèn vào các vector zero để không ảnh hưởng đến điện áp đầu ra. Cấu hình mới của mạng nguồn kháng được trình bày để cải thiện hệ số tăng áp và độ lợi điện áp. Kết quả điện áp đặt trên các phần tử công suất giống như tụ điện, diode và khóa chuyển mạch công suất được giảm một cách đáng kể. Phương pháp điều khiển xung ngắn mạch có thể giảm điện áp đặt trên tụ điện lên đến 40% so với phương pháp điều khiển truyền thống khi chu kỳ đóng D0 là 0.15 và chu kỳ đóng D1 là 0.7. Bằng cách điều khiển kỹ thuật xung xen kẽ giữa mạng nguồn kháng và nghịch lưu hình T. Nguyên lý hoạt động và phương pháp điều khiển tổng thể cho cấu hình này cũng được trình bày chi tiết. Kết quả mô phỏng được thực hiện với sự trợ giúp của phần mềm PSIM để chứng minh tính chính xác của phương pháp này.

Nghịch Lưu Tăng Áp Ba Bậc Với Khả Năng Giảm Điện Áp Đặt Trên Tụ

This paper constructs L-covering fuzzy variable precision rough set and mainly studies some properties of type I and type II L-covering fuzzy lower and upper approximation operators of L-fuzzy sets on X. Topology properties of type I and type II L-covering fuzzy lower and upper approximation operators are also discussed through a fuzzy interior operator and fuzzy closure operator. Moreover, we investigate the dual properties and compare between L-covering fuzzy variable precision rough approximation operators.

A new approach on covering fuzzy variable precision rough sets based on residuated lattice

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Papers

Three-way decisions based on covering rough set

L-fuzzy multigranulation rough set based on residuated lattices

Nghịch Lưu Tăng Áp Ba Bậc Với Khả Năng Giảm Điện Áp Đặt Trên Tụ

A new approach on covering fuzzy variable precision rough sets based on residuated lattice